# News archive

## Updated frequency-domain filtering example

### 11 marca 2013 09:20

The FFT example using Fourier Transform to perform frequency-domain filtering has been updated to reflect latest API changes in Aquila. See previous version of this example.

`#include "aquila/global.h" ...`

## FFT examples

### 29 kwietnia 2010 02:07

Two new **FFT**-related examples appeared. Simpler one shows how to calculate the spectrum, and another one demonstrates frequency-domain signal filtering.

The window functions example was simplified, thanks to the ...

## Frequency-domain filtering with FFT

### 29 kwietnia 2010 01:47

Signal filtering can be expressed in two (equivalent) approaches.

**convolution**of the signal and*impulse response*of the filter - in time domain**multiplication**of signal spectrum and filter's*transfer ...*

## A simple FFT example

### 28 kwietnia 2010 22:03

The following example shows how to use **FFT** to calculate spectrum of a signal. The input signal is a sum of two sine waves (125 and 700 Hz) sampled at ...